Commit | Line | Data |
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96518518 | 1 | /* |
ef1f7df9 | 2 | * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net> |
9370761c | 3 | * Copyright (c) 2012 Pablo Neira Ayuso <pablo@netfilter.org> |
eb31628e | 4 | * Copyright (c) 2012 Intel Corporation |
96518518 PM |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * Development of this code funded by Astaro AG (http://www.astaro.com/) | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/list.h> | |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/ip.h> | |
96518518 PM |
18 | #include <linux/netfilter.h> |
19 | #include <linux/netfilter_ipv4.h> | |
96518518 PM |
20 | #include <linux/netfilter/nf_tables.h> |
21 | #include <net/netfilter/nf_conntrack.h> | |
22 | #include <net/netfilter/nf_nat.h> | |
23 | #include <net/netfilter/nf_nat_core.h> | |
24 | #include <net/netfilter/nf_tables.h> | |
0ca743a5 | 25 | #include <net/netfilter/nf_tables_ipv4.h> |
96518518 PM |
26 | #include <net/netfilter/nf_nat_l3proto.h> |
27 | #include <net/ip.h> | |
28 | ||
06198b34 | 29 | static unsigned int nft_nat_do_chain(void *priv, |
65cd90ac | 30 | struct sk_buff *skb, |
d7cf4081 | 31 | const struct nf_hook_state *state, |
65cd90ac | 32 | struct nf_conn *ct) |
96518518 | 33 | { |
0ca743a5 | 34 | struct nft_pktinfo pkt; |
96518518 | 35 | |
6aa187f2 | 36 | nft_set_pktinfo_ipv4(&pkt, skb, state); |
0ca743a5 | 37 | |
06198b34 | 38 | return nft_do_chain(&pkt, priv); |
96518518 PM |
39 | } |
40 | ||
06198b34 | 41 | static unsigned int nft_nat_ipv4_fn(void *priv, |
65cd90ac | 42 | struct sk_buff *skb, |
238e54c9 | 43 | const struct nf_hook_state *state) |
96518518 | 44 | { |
06198b34 | 45 | return nf_nat_ipv4_fn(priv, skb, state, nft_nat_do_chain); |
96518518 PM |
46 | } |
47 | ||
06198b34 | 48 | static unsigned int nft_nat_ipv4_in(void *priv, |
65cd90ac | 49 | struct sk_buff *skb, |
238e54c9 | 50 | const struct nf_hook_state *state) |
96518518 | 51 | { |
06198b34 | 52 | return nf_nat_ipv4_in(priv, skb, state, nft_nat_do_chain); |
96518518 PM |
53 | } |
54 | ||
06198b34 | 55 | static unsigned int nft_nat_ipv4_out(void *priv, |
65cd90ac | 56 | struct sk_buff *skb, |
238e54c9 | 57 | const struct nf_hook_state *state) |
96518518 | 58 | { |
06198b34 | 59 | return nf_nat_ipv4_out(priv, skb, state, nft_nat_do_chain); |
65cd90ac | 60 | } |
96518518 | 61 | |
06198b34 | 62 | static unsigned int nft_nat_ipv4_local_fn(void *priv, |
65cd90ac | 63 | struct sk_buff *skb, |
238e54c9 | 64 | const struct nf_hook_state *state) |
65cd90ac | 65 | { |
06198b34 | 66 | return nf_nat_ipv4_local_fn(priv, skb, state, nft_nat_do_chain); |
96518518 PM |
67 | } |
68 | ||
2a37d755 | 69 | static const struct nf_chain_type nft_chain_nat_ipv4 = { |
9370761c PNA |
70 | .name = "nat", |
71 | .type = NFT_CHAIN_T_NAT, | |
fa2c1de0 PM |
72 | .family = NFPROTO_IPV4, |
73 | .owner = THIS_MODULE, | |
9370761c PNA |
74 | .hook_mask = (1 << NF_INET_PRE_ROUTING) | |
75 | (1 << NF_INET_POST_ROUTING) | | |
76 | (1 << NF_INET_LOCAL_OUT) | | |
77 | (1 << NF_INET_LOCAL_IN), | |
fa2c1de0 | 78 | .hooks = { |
65cd90ac PNA |
79 | [NF_INET_PRE_ROUTING] = nft_nat_ipv4_in, |
80 | [NF_INET_POST_ROUTING] = nft_nat_ipv4_out, | |
81 | [NF_INET_LOCAL_OUT] = nft_nat_ipv4_local_fn, | |
82 | [NF_INET_LOCAL_IN] = nft_nat_ipv4_fn, | |
96518518 PM |
83 | }, |
84 | }; | |
85 | ||
9370761c | 86 | static int __init nft_chain_nat_init(void) |
96518518 PM |
87 | { |
88 | int err; | |
89 | ||
9370761c | 90 | err = nft_register_chain_type(&nft_chain_nat_ipv4); |
96518518 | 91 | if (err < 0) |
9370761c | 92 | return err; |
96518518 | 93 | |
96518518 | 94 | return 0; |
96518518 PM |
95 | } |
96 | ||
9370761c | 97 | static void __exit nft_chain_nat_exit(void) |
96518518 | 98 | { |
9370761c | 99 | nft_unregister_chain_type(&nft_chain_nat_ipv4); |
96518518 PM |
100 | } |
101 | ||
9370761c PNA |
102 | module_init(nft_chain_nat_init); |
103 | module_exit(nft_chain_nat_exit); | |
96518518 PM |
104 | |
105 | MODULE_LICENSE("GPL"); | |
106 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
9370761c | 107 | MODULE_ALIAS_NFT_CHAIN(AF_INET, "nat"); |